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1 . 已知向量
,
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc009cdbdb648e63e75034b9763e1e79.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c04ca064ed4fd42d4e25877e886f751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b12729dbc8aac5c77094d76576a351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc009cdbdb648e63e75034b9763e1e79.png)
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2020-05-06更新
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2卷引用:安徽省亳州市涡阳第—中学2020-2021学年高一下学期期末数学试题